In United States patent law, utility is a patentability requirement. As provided by 35 U.S.C. § 101, an invention is "useful" if it provides some identifiable benefit and is capable of use. The majority of inventions are usually not challenged as lacking utility, but the doctrine prevents the patenting of fantastic or hypothetical devices such as perpetual motion machines.
Neither software nor computer programs are explicitly mentioned in statutory United States patent law. Patent law has changed to address new technologies, and decisions of the United States Supreme Court and United States Court of Appeals for the Federal Circuit (CAFC) beginning in the latter part of the 20th century have sought to clarify the boundary between patent-eligible and patent-ineligible subject matter for a number of new technologies including computers and software. The first computer software case in the Supreme Court was Gottschalk v. Benson in 1972. Since then, the Supreme Court has decided about a half dozen cases touching on the patent eligibility of software-related inventions.
The United States Court of Appeals for the Federal Circuit is a United States court of appeals headquartered in Washington, D.C. The court was created by Congress with passage of the Federal Courts Improvement Act of 1982, which merged the United States Court of Customs and Patent Appeals and the appellate division of the United States Court of Claims, making the judges of the former courts into circuit judges. The Federal Circuit is particularly known for its decisions on patent law, as it is the only appellate-level court with the jurisdiction to hear patent case appeals.
State Street Bank and Trust Company v. Signature Financial Group, Inc., 149 F.3d 1368, also referred to as State Street or State Street Bank, was a 1998 decision of the United States Court of Appeals for the Federal Circuit concerning the patentability of business methods. State Street for a time established the principle that a claimed invention was eligible for protection by a patent in the United States if it involved some practical application and, in the words of the State Street opinion, "it produces a useful, concrete and tangible result."
Business method patents are a class of patents which disclose and claim new methods of doing business. This includes new types of e-commerce, insurance, banking and tax compliance etc. Business method patents are a relatively new species of patent and there have been several reviews investigating the appropriateness of patenting business methods. Nonetheless, they have become important assets for both independent inventors and major corporations.
Patentable, statutory or patent-eligible subject matter is subject matter which is susceptible of patent protection. The laws or patent practices of many countries provide that certain subject-matter is excluded from patentability, even if the invention is novel and non-obvious. Together with novelty, inventive step or nonobviousness, utility, and industrial applicability, the question of whether a particular subject matter is patentable is one of the substantive requirements for patentability.
In United States patent law, inequitable conduct is a breach of the applicant's duty of candor and good faith during patent prosecution or similar proceedings. A claim of inequitable conduct is a defense to allegations of patent infringement. Even in an instance when a valid patent suffers infringement, a court ruling on an allegation of infringement may exercise its power of equitable discretion not to enforce the patent if the patentee has engaged in inequitable conduct.
KSR Int'l Co. v. Teleflex Inc., 550 U.S. 398 (2007), is a decision by the Supreme Court of the United States concerning the issue of obviousness as applied to patent claims.
Ariad Pharmaceuticals et al. v. Eli Lilly and Company, 598 F.3d 1336, is a United States court case regarding accusations of infringement by Eli Lilly on U.S. Patent 6,410,516 held by ARIAD Pharmaceuticals. The Federal Circuit ruled en banc to invalidate the patent for a lack of sufficient description of the invention. Amici briefing before the en banc panel was intensive, with 26 separate briefs filed, and the final decision has been heavily discussed by legal commentators. Its ultimate impact on biotechnology patents remains to be determined.
In re Bilski, 545 F.3d 943, 88 U.S.P.Q.2d 1385, was an en banc decision of the United States Court of Appeals for the Federal Circuit (CAFC) on the patenting of method claims, particularly business methods. The Federal Circuit court affirmed the rejection of the patent claims involving a method of hedging risks in commodities trading. The court also reiterated the machine-or-transformation test as the applicable test for patent-eligible subject matter, and stated that the test in State Street Bank v. Signature Financial Group should no longer be relied upon.
Mallinckrodt, Inc. v. Medipart, Inc., 976 F.2d 700, is a decision of the United States Court of Appeals for the Federal Circuit, in which the court appeared to overrule or drastically limit many years of U.S. Supreme Court precedent affirming the patent exhaustion doctrine, for example in Bauer & Cie. v. O'Donnell.
Jazz Photo Corp. v. United States International Trade Commission, 264 F.3d 1094, was a case in which the United States Court of Appeals for the Federal Circuit clarified the law of repair and reconstruction, holding that it was not a patent infringement for one party to restore another party's patented "one-use" camera to be used a second time.
Melvin T. Brunetti was a United States Circuit Judge of the United States Court of Appeals for the Ninth Circuit.
Jimmie V. Reyna is an American lawyer, former president of the Hispanic National Bar Association, and currently a United States Circuit Judge of the United States Court of Appeals for the Federal Circuit. Reyna was nominated to the Federal Circuit on September 29, 2010. When nominated, he received the highest rating possible by the American Bar Association Standing Committee on the Federal Judiciary: "Unanimously Well Qualified." On April 4, 2011, the U.S. Senate confirmed his nomination by a roll-call vote of 86-0.
Fujifilm Corp v. Benun, 605 F.3d 1366 was a case in which the United States Court of Appeals for the Federal Circuit affirmed the judgment made by the United States District Court for the District of New Jersey that the defendants infringed patents owned by Fujifilm Corporation.
Phillips v. AWH Corp., 415 F.3d 1303, was a case decided by the Federal Circuit that clarified the hierarchy of evidentiary sources usable for claim construction in patent law.
In re Lowry, 32 F.3d 1579 was a 1994 decision of the United States Court of Appeals for the Federal Circuit on the patent eligibility of data structures. The decision, which reversed a PTO rejection of data structure claims, was followed by a significant change in PTO policy as to granting software related patents, a cessation of PTO appeals to the Supreme Court from reversals of PTO rejections of software patent applications, an increasing lenity at the Federal Circuit toward such patents and patent applications, and a great increase in the number of software patents issued by the PTO.
The reverse doctrine of equivalents is a legal doctrine of United States patent law, according to which a device that appears to literally infringe a patent claim, by including elements or limitations that correspond to each element or limitation of the patent claim, nonetheless does not infringe the patent, because the accused device operates on a different principle. That is, "it performs the same or a similar function in a substantially different way." It has been said that "the purpose of the ‘reverse’ doctrine is to prevent unwarranted extension of the claims beyond a fair scope of the patentee’s invention."
Matal v. Tam, 582 U.S. ___ (2017), is a United States Supreme Court case in which the Court affirmed unanimously the judgment of the Court of Appeals for the Federal Circuit that the provisions of the Lanham Act's prohibiting the registration of trademarks that may "disparage" persons, institutions, beliefs, or national symbols with the United States Patent and Trademark Office violated the First Amendment.
SAS Institute Inc. v. Iancu, 584 U.S. ___ (2018), was a United States Supreme Court case in which the Court held the United States Patent and Trademark Office, when conducting an inter partes review, must make judgement on all patent claims contested by the petitioner.
